While she does have an air of "heavy flow" about her, we would have pegged Lindsay Lohan for more of the o.b. tampon type than the super maxi type:
OK, so we've all seen Lindsay's genitalia, so we know she's not packing extraneous testicles nor rolled-up meatflaps. So there's really only one explanation for her tights-tumor: that's where she hides her stash!
Bow down to the Lohan! She's at MrSkin.com.